CN211889148U - Ultra-long hard alloy deep hole twist drill for deep hole machining - Google Patents
Ultra-long hard alloy deep hole twist drill for deep hole machining Download PDFInfo
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- CN211889148U CN211889148U CN202020225780.0U CN202020225780U CN211889148U CN 211889148 U CN211889148 U CN 211889148U CN 202020225780 U CN202020225780 U CN 202020225780U CN 211889148 U CN211889148 U CN 211889148U
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Abstract
The utility model relates to a deep hole processing is with overlength carbide deep hole fluted drill, stalk portion and cutting part including coaxial setting, set up two spiral chip grooves along the axis on the cutting part, form the back through two chip grooves, establish the holding surface above the cutting part, the holding surface is the drilling direction, establish the U-shaped cooling bath on the holding surface, the cutting part left side is equipped with the apex angle, for the cutting edge, be equipped with the chisel edge on the cutting edge, vice sword and main sword, the crossing department circular arc transition of main sword and vice sword forms the transition sword, vice sword, transition sword and main sword link to each other in order and form continuous cutting edge, two continuous cutting edges are connected through the chisel edge with central cross line symmetric distribution and between the two. The utility model provides a super long carbide deep hole twist drill, the circular arc transitional shape of helix angle, flute shape, core thickness, the cutting blade of the holding surface of drill bit, chip groove has been designed to the pertinence, has guaranteed that drill bit rigidity, chip removal performance and blade are strong perfect unified, and the precision has improved 100%, and the cutter life-span improves 8 ~ 20 times.
Description
Technical Field
The utility model belongs to the technical field of the cutter, concretely relates to overlength carbide deep hole fluted drill is used in deep hole processing.
Background
Along with the rapid development of the mechanical industry, the quality and the efficiency of mechanical part processing are higher and higher, and the following defects exist in the traditional processing technology such as a high-speed steel drill bit, a gun drill, a reamer and the like: the machining efficiency is low, the surface quality of the hole is poor, the hole position degree is poor, the service life of the drill bit is short, and the current requirements cannot be met far away.
By taking the automobile engine crankshaft with large deep hole processing amount in parts and the hydraulic valve block in engineering machinery as examples, the main materials of the two parts are alloy steel, the processed materials have high hardness (HRC 26-32), high tensile strength (greater than or equal to 900-1100 MPa), high requirement on hole surface roughness (Ra3.2), more through holes and high requirement on position degree phi 0.2mm, and the materials are difficult to process, large in batch and high in precision requirement. Due to the characteristics of high precision of the two parts, the machining process is upgraded from a traditional drilling machine to a full-automatic numerical control special machine tool for machining, the full-automatic numerical control special machine tool basically mainly comprises an import and is expensive, the manufacturing cost is increased sharply under the condition of not improving the machining efficiency, the machining precision and the machining efficiency of the traditional high-speed steel drill bit can not meet the requirements, and the efficiency can not meet the requirements although the precision of a gun drill meets the requirements. And when traditional high-speed steel drill bit, reamer etc. were made, can't realize central cooling, only outside cooling, the cooling efficiency is low.
Therefore, in order to reduce the processing cost and improve the processing efficiency, it is particularly important to design an efficient hard alloy inner-cooling deep-hole twist drill.
SUMMERY OF THE UTILITY MODEL
For solving the technical problem that exists among the prior art, the utility model aims to provide a deep hole processing is with overlength carbide deep hole fluted drill can be applied to the spare part deep hole processing field of trades such as space flight and aviation, military project, car, engineering machine tool equipment.
In order to realize the above purpose, reach above-mentioned technological effect, the utility model discloses a technical scheme be:
the utility model provides a deep hole processing is with overlength carbide deep hole fluted drill, adopts the K40 material to make, stalk portion and cutting part including coaxial setting, set up two spiral chip grooves along the axis on the cutting part, form the back through two chip grooves, be equipped with the holding surface above the cutting part, the holding surface is the drilling direction, be equipped with the U-shaped cooling bath on the holding surface, U-shaped cooling bath links to each other with the chip groove, the coolant liquid in the chip groove flows into to realize the holding surface side internal cooling in the U-shaped cooling bath, the cutting part left side is equipped with the apex angle, for the cutting edge, be equipped with the chisel edge on the cutting edge, vice sword and main sword, the crossing department circular arc transition of main sword and vice sword forms transition sword, vice sword, transition sword and main sword link to each other in order and form continuous cutting edge, two continuous cutting edges are connected through the chisel edge with central.
Further, a clearance is arranged between the handle part and the blade part.
Furthermore, the helical angle beta of the chip groove is 25-35 degrees.
Furthermore, be equipped with two sections core thickness on the chip groove, including the first core thickness portion and the second core thickness portion that set gradually from left to right, the core thickness of first core thickness portion is 30-34% of cutting part diameter D1, and the core thickness of second core thickness portion is 25 ~ 30% of cutting part diameter D1.
Furthermore, the blade diameter D1 of the overlength cemented carbide deep hole twist drill is 4-25 mm, the blade length L1 of the supporting surface is 5-8 times of the blade diameter D1, and the groove length L2 of the chip groove is 10-40 times of the blade diameter D1.
Furthermore, the width B of the U-shaped cooling groove is 0.3-1.5 mm, and the depth H is 0.2-1 mm.
Further, the length of the chisel edge is 0.05-0.15 mm.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the design of a net-shaped supporting surface is adopted, so that the supporting performance of the drill bit is enhanced; the U-shaped cooling groove is arranged on the supporting surface, so that the cooling and lubrication of the drill bit are enhanced, and the friction force is reduced;
2. the helix angle of the chip groove is 25-35 degrees, so that the chip groove can meet the processing requirements of various processed materials;
3. the chip removal groove is U-shaped, the rigidity of the drill bit is enhanced, chips are smoothly removed, and the cutter is not easily broken during deep hole machining;
4. the front end (left end) of the chip removal groove is large in core thickness, and the rear end (right end) of the chip removal groove is small in core thickness, so that the chip removal capacity is improved; when the drill bit is processed, the front end core is thick, the chip groove is small, the scrap iron is extruded by the groove, the radius of the curled arc is small, the shape of the scrap iron is small, the scrap iron cannot be clamped in the hole, the rear end core is thick, the space of the chip groove is large, and the scrap iron is smoothly discharged;
5. the length of the supporting surface is 5-8 times of the diameter of the blade, so that the friction force between the supporting surface and the hole wall is reduced, and the cutter breakage is effectively prevented;
6. the intersection of the main edge and the auxiliary edge on the cutting edge is in arc transition, so that the cutting life of the cutting edge is prolonged, the strength of the arc transition cutting edge is high, the edge is not easy to break under cutting impact, the cutting time is long, and the service life is long;
7. the symmetry of the chisel edge and the auxiliary edge on the cutting edge is controlled in a 0.01mm high precision range, the precision is high, the centering is accurate when the drill bit is processed, the two cutting edges (the auxiliary edge, the transition edge and the main edge) which are symmetrically distributed by a central cross line are sequentially connected to form a continuous cutting edge, the error participating in cutting is extremely small, and the precision of the position degree of a processed hole is high.
Drawings
FIG. 1 is an overall structure diagram of the present invention;
fig. 2 is a schematic structural view of the apex angle of the present invention;
fig. 3 is a cross-sectional view taken along line a-a of fig. 1 in accordance with the present invention;
fig. 4 is a cross-sectional view taken along line B-B of fig. 1 in accordance with the present invention;
FIG. 5 is a schematic structural view of the support surface and the U-shaped cooling tank of the present invention;
fig. 6 is a view of the present invention in the direction of M in fig. 5;
FIG. 7 is a schematic structural view of a U-shaped cooling tank of the present invention;
wherein, 1-handle 1; 2-avoiding the space; 3-chip removal groove; 4-back; 5-a blade part; 6-a support surface; 7-top angle; 8-U-shaped cooling tank; 9-a chisel edge; 10-a secondary edge; 11-a transition edge; 12-main edge.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so that the advantages and features of the invention can be more easily understood by those skilled in the art, thereby making the scope of the invention more clearly defined.
As shown in fig. 1-7, the ultralong hard alloy deep hole twist drill for deep hole processing comprises a handle part 1 and a blade part 5 which are coaxially arranged, wherein two spiral chip grooves 3 are arranged on the blade part 5 along a central axis, the back 4 is formed by the two chip grooves 3, the supporting face 6 is arranged on the edge part 5, the supporting face 6 is used for guiding drilling, the U-shaped cooling groove 8 is formed in the supporting face 6, the U-shaped cooling groove 8 is connected with the chip grooves 3, cooling liquid in the chip grooves 3 flows into the U-shaped cooling groove 8 to realize cooling in the side face of the supporting face, the top angle 7 is arranged on the left side of the edge part 5 and serves as a cutting edge, a cross edge 9, an auxiliary edge 10 and a main edge 12 are arranged on the cutting edge, the transition edge 11 is formed by arc transition at the intersection of the main edge 12 and the auxiliary edge 10, the transition edge 11 and the main edge 12 are sequentially connected to form a continuous cutting edge, the two continuous cutting edges are symmetrically distributed by a central cross line.
A clearance 2 is arranged between the handle part 1 and the blade part 5.
The helix angle of chip groove 3 is 25 ~ 35.
The chip groove 3 is provided with two sections of core thicknesses, and the two sections of core thicknesses comprise a first core thickness part and a second core thickness part which are sequentially arranged from left to right, wherein the core thickness of the first core thickness part is 30-34% of the diameter of the blade part, and the core thickness of the second core thickness part is 25-30% of the diameter of the blade part.
The blade diameter of the ultralong hard alloy deep-hole twist drill is 4-25 mm, the length L1 of the blade part of the supporting surface 6 is 5-8 times of the blade diameter, and the groove length L2 of the chip groove 3 is 10-40 times of the blade diameter.
The width B of the U-shaped cooling groove 8 is 0.3-1.5 mm, and the depth H is 0.2-1 mm.
The length of the chisel edge 9 is 0.05-0.15 mm.
Example 1
As shown in figures 1-7, an ultra-long hard alloy deep hole twist drill for deep hole processing comprises a handle part 1 and a blade part 5, the central axes of the handle part 1 and the blade part 5 are on the same straight line, the handle part 1 is used for installing a cutter and a cutter handle, a clearance 2 is arranged between the handle part 1 and the blade part 5 to reduce the friction of a hole wall, two spiral chip grooves 3 are arranged on the blade part 5 along the central axis, two back parts 4 are formed by the two chip grooves 3, the back part 4 is an essential part of a drill bit structure, the drilling efficiency and the service life of the drill bit are determined by the shape and the size of the back part, a reticular supporting surface 6 is arranged on the blade part 5 (the left end), the supporting surface 6 is used for guiding the drilling and improving the processing precision of the hole, reticular U-shaped cooling grooves 8 are arranged on the supporting surface 6, a plurality of U-shaped cooling grooves 8 form a reticular structure in a shape, the cooling liquid in the chip groove 3 can flow into the U-shaped cooling groove 8 to realize support surface side cooling, the left side of the edge part 5 is provided with an apex angle 7 serving as a cutting edge, the apex angle 7 enables the drill to be machined lightly and quickly, the cutting diameter D1 of the ultralong hard alloy deep-hole twist drill is 4-25 mm, the length L1 of the edge part of the support surface 6 is 5-8 times of the cutting diameter D1, the groove length L2 of the chip groove 3 is 10-40 times of the cutting diameter D1, and the helix angle beta of the chip groove 3 is 25-35 degrees.
As shown in fig. 2, a minor cutting edge 10 and a major cutting edge 12 are provided on the cutting edge of the top corner 7, a chisel edge 9 is provided on the cutting edge of the top corner 7, in order to reduce the drilling assisting force, the length of the chisel edge 9 is controlled to be 0.05-0.15 mm, a transition edge 11 is formed by arc transition at the intersection of the major cutting edge 12 and the minor cutting edge 10, the transition edge 11 and the major cutting edge 12 are sequentially connected to form a continuous cutting edge, and two continuous cutting edges are symmetrically distributed with a central cross line and are connected with each other through the chisel edge 9.
As shown in fig. 3-4, two core thicknesses are provided on the flutes 3, including a first core thickness part (a-a front end large core thickness) and a second core thickness part (B-B rear end small core thickness) which are sequentially provided from left to right, the core thickness Φ 1 of the first core thickness part is 30-34% of the blade diameter D1, and the core thickness Φ 2 of the second core thickness part is 25-30% of the blade diameter D1.
As shown in FIGS. 5 to 7, the width B of the U-shaped cooling channel 8 on the support surface 6 is 0.3 to 1.5mm, and the depth H is 0.2 to 1 mm.
Through contrasting current high-speed steel fluted drill and gun drill processing technology and the utility model discloses a processing technology, as shown in table 1, can discover, the utility model discloses an overlength carbide deep hole fluted drill surface quality Ra3.0, once process is accomplished, and machining efficiency is 15 times that current high-speed steel fluted drill and gun drill etc. the life-span is that 12 times of high-speed steel fluted drill and gun drill etc. are many, very big improvement machining efficiency, reduced manufacturing cost, fully explained the utility model discloses a fluted drill structural design is reasonable, and the perfect unity that has guaranteed drill bit rigidity, chip removal performance and blade are strong, and the precision has improved 100%, and the cutter life-span has improved 8 ~ 20 times, satisfies the processing requirement of intelligent manufacturing.
TABLE 1
The utility model has the advantages that:
1. the spiral internal cooling can be realized, the cutting temperature is reduced, and the service life of the cutter is long;
2. the imported hard alloy material with stable performance is selected to manufacture the twist drill, so that the performance of the drill is stable, the automatic processing requirement is met, and intelligent manufacturing is realized;
3. the high-speed and high-efficiency machining can be realized, the chip removal and cooling are not required to be stopped in the midway when the drill reaches the end, the machining efficiency is about 10 times that of the traditional high-speed steel, gun drill and the like, the machining efficiency is greatly improved, and the machining cost is reduced;
4. the position degree of the drilled hole is controlled within 0.15mm, the hole roughness is controlled within Ra3.2, one-time processing can be completed, the processing technology which can be completed by two procedures of drilling and expanding of the traditional high-speed steel drill bit is improved, the processing precision is ensured, and the processing efficiency is improved;
5. by adopting mirror grinding and polishing processes, the friction force during the processing of the drill bit can be reduced, and the service life of the drill bit is prolonged.
The part of the utility model which is not described in detail can be realized by adopting the prior art, and the description is not repeated here.
The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.
Claims (7)
1. The utility model provides a deep hole processing is with overlength carbide deep hole fluted drill, a serial communication port, including stalk portion (1) and the cutting part (5) of coaxial setting, set up two spiral chip grooves (3) along the axis on cutting part (5), form back (4) through two chip grooves (3), be equipped with holding surface (6) above cutting part (5), holding surface (6) are the drilling direction, be equipped with U-shaped cooling bath (8) on holding surface (6), U-shaped cooling bath (8) and chip groove (3) link to each other, the coolant liquid in chip groove (3) flows into realizes holding surface (6) side internal cooling in U-shaped cooling bath (8), cutting part (5) left side is equipped with apex angle (7), for the cutting edge, be equipped with chisel edge (9), vice sword (10) and main sword (12) on the cutting edge, main sword (12) and the crossing department of vice sword (10) circular arc transition form transition sword (11), the auxiliary cutting edge (10), the transition cutting edge (11) and the main cutting edge (12) are sequentially connected to form a continuous cutting edge, the two continuous cutting edges are symmetrically distributed in a central cross line, and the two continuous cutting edges are connected through the chisel edge (9).
2. The ultra-long hard alloy deep hole twist drill for deep hole machining according to claim 1, characterized in that a clearance (2) is arranged between the handle part (1) and the blade part (5).
3. The ultra-long hard alloy deep hole twist drill for deep hole machining according to claim 1, characterized in that the helix angle of the chip groove (3) is 25-35 °.
4. The deep hole twist drill made of the ultra-long hard alloy according to claim 1, wherein the chip groove (3) is provided with two core thicknesses, including a first core thickness part and a second core thickness part, which are arranged from left to right in sequence, the core thickness of the first core thickness part is 30-34% of the diameter of the blade part, and the core thickness of the second core thickness part is 25-30% of the diameter of the blade part.
5. The ultra-long hard alloy deep hole twist drill for deep hole machining according to claim 1, characterized in that the blade diameter of the ultra-long hard alloy deep hole twist drill is 4-25 mm, the blade part length L1 of the supporting surface (6) is 5-8 times of the blade diameter, and the groove length L2 of the chip discharge groove (3) is 10-40 times of the blade diameter.
6. The ultra-long hard alloy deep hole twist drill for deep hole machining according to claim 1, wherein the width of the U-shaped cooling groove (8) is 0.3-1.5 mm, and the depth is 0.2-1 mm.
7. The ultra-long hard alloy deep hole twist drill for deep hole machining according to claim 1, wherein the length of the chisel edge (9) is 0.05-0.15 mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020225780.0U CN211889148U (en) | 2020-02-28 | 2020-02-28 | Ultra-long hard alloy deep hole twist drill for deep hole machining |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020225780.0U CN211889148U (en) | 2020-02-28 | 2020-02-28 | Ultra-long hard alloy deep hole twist drill for deep hole machining |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115488398A (en) * | 2022-09-09 | 2022-12-20 | 河南科技学院 | Method for grinding twist drill edge band |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115488398A (en) * | 2022-09-09 | 2022-12-20 | 河南科技学院 | Method for grinding twist drill edge band |
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